89...................................Power of Building Authority to prohibit installation of soil fitments ... ... 138
90........................................Power of Building Authority to require provision of neutralizing tanks. etc. 138

-soil pipe- means a pipe used or constructed to be used for carrying
ofT soil;

,.sub-soil water' means water occurring naturally below the surface
of the ground.

---surfacewater--- means rain water from any part of a building
including any paved.area or ground. whether paved or not.
appurtenant to any building,

---tradeeffluenC means any liquid, either with or without particles of
matter in suspension therein, which is wholly or in part pro-
duced in the course of any trade or industry;

---waste-means used water from a waste fitment or similar fitment..

'waste fitment- means a bath, lavatory basin or sink, other than a
slop sink:

-waste pipe' means a pipe used or constructed to be used for
carrying off waste.

'water authority- and -waterworks- have the meaning assigned to
them by section 2 of the Waterworks Ordinance.

PART 11

STANDARDS OF SANITARY FITMENTS

3. In the regulations in this Part. unless the context otherwise
requires-

,,entertainment- includes any concert, stage play, stage performance
or other musical, dramatic or theatrical entertainment, or any
part thereof, and the provision of facilities for the playing of
any game, but does not include any cinematographic display,

---factory-,'mine' and 'industrial undertaking- have the meaning
assigned to them by section 2 of the Factories and Industrial
Undertakings Ordinance;

'habitable space' means the aggregate of the areas of the floors in
a building, excluding kitchens, staircases, staircase halls. lift
landings, the space used in providing the watercloset fitments.
urinals and lavatory basins, required, by this regulation, to be
provided, and any space occupied by machinery for any lift;

1iving room' means any room intended or adapted as a place for
cooking or sleeping;

'place of public entertainment' means any building constructed or
adapted to be used for any public entertainment;

-public dance hall- means any place opened, kept or used for the
purpose of dancing, to which the general public is admitted.
with or without payment for admission..

-public entertainment- means any entertainment to which the
general public is admitted, with or without payment for
admission;

-residential building- means a domestic building. but does not
include any hostel, dormitory or other room or premises pro-
vided for housing or lodging some or all of the pupils of any
school out of school hours, whether such hostel dormitory or
other room or premises is in or is part of the same building
or group of buildings as the classrooms in the school or not;

',school- has the meaning assigned to it by section 3 of the
Education Ordinance;

'tenement house' means a building in the domestic part of which
any living room is intended or adapted for the use of more than
one tenant or sub-tenant;

'usable floor space' means the aggregate of the areas of the floors in
a building, excluding any staircases, staircase halls, lift landings,
the space used in providing the watercloset fitments, urinals and
lavatory basins required, by this regulation, to be provided, and
any space occupied by machinery for any lift, air-conditioning
system or similar service provided for the building.

4. (1) Save as provided in paragraph (2). in every residential
building-

(a)where separate waterclosets are not provided for male
persons and for female persons. the number of watercloset
fitments provided shall be not less than the number
specified in Table I;

(b)where separate waterclosets are provided for male persons
and for female persons, the number of watercloset fitments

provided for female persons shall be not less than the
number specified in Table 11 and the number of watercloset
fitments provided for male persons shall, save as provided
in paragraph (c), be not less than the number specified in
Table 111;

(c)where separate waterclosets are provided for male persons
and for female persons and urinals are installed for the use
of male persons, the number of watercloset fitments and
urinals for male persons shall be not less than the number
specified in Table IV;

(d)the number of lavatory basins and baths or showers
provided shall not be less than the number specified in
Table V.

TABLE 1

No. of persons residing
or likely to reside in No. ofivatercloset fitments
the building
More than 8 2 and 1 additional watercloset fitment
forevery 15 such persons. or part
thereof. o~er 20.

TABLE 11

No. of female persons residing
or likely to reside inNo. of svatercloset fitments
the building
1-8 inclusive 1
More than 8 and 1 additional watercloset fitment
for every 15 such persons. or part
thereof. over 20.

TABLE Ill

No. of male persons residing
or likely to reside inNo. of watercloset fitments
the building
1 -8 inclusive
More than 8 2 and 1 additional such fitment for
every 15 such persons. or part thereof.
o,,.e~20.

TABLE IV

No. of male persons residing N f i& ater-
or likely to reside in 1 0. cNo. of urinals
i closet fitments
the building
1-12 inclusive 1
More than 12 2 and 1 additional2 and 1 additional
watercloset fit-orinal for every
ment for ex cry20 such persons.
20 such persons,or part thereof.
or part thereof,over 25.
over 25.

TABLE V

No. of person, residing
or likel~ to reside in No. (t'ia\~ttor~ No. of bath., or
thc'building basinssho~%crs

1-8 inclusive
More than 8 2 and 1 additional2 and 1 additional
lavatory basinbath or shower
for c,~ ers 15 such for ex cry 15 such
persons. or partpersons. or part
thereof. o~er 20.thereof. o~cr 20.

(2) (a) In the case ' of a tenement house, water supply points
may, subject to the provisions of sub-paragraphs (b) and
(c), be provided in lieu of lavatory basins and baths or
showers and, for the purposes of paragraph (1)(d), the
provision of one water supply point shall be deemed to
be the provision of one lavatory basin and one bath
or shower.

(b)The number of water supply points so provided shall be
not less than the number of lavatory basins required. by
paragraph (1)(d), to be provided in tiIc tenement house.

(c.)Such water supply points shall be provided in a separate
compartment, not less than 0.75 M2 in area. or in a
watercloset.

(d)For the purposes of this paragraph. any supply of water
provided for a sink in any kitchen shall not ~e a water
supply point,

(3) The watercloset fitments or the watercloset fitments and
urinals, as the case may be, provided in any residential building in
accordance with the provisions of paragraph (1). and. where. in
accordance with regulation 9, latrine fitments or latrine fitments and
bucket urinals, as the case may be. are provided in any residential
building, the same shall be situated in the building to the satisfaction
of the Building Authority.

(4) For the purposes of this regulation-

(a)the number of persons residing or likely to reside in any
residential building shall be determined by the Building
Authority. and, in the case of tenement houses and barrack
and dormitory accommodation, shall be so determined at
the rate of one person for every 3.25 m' of habitable space;
and

(b)where separate waterclosets are provided for male persons
and for female persons, the proportion of male persons to
female persons residing or likely to reside in the building
shall, unless the Building Authority is satisfied that the
proportion is or will be otherwise. be deemed to be 1: 1.

5. (1) Save as provided in paragraph (3), in every building
used or intended to be used for the purpose of an office and in every
industrial undertaking and other place of work-

(a)the number of watercloset fitments and urinals provided
for male persons employed or likely to be employed therein
shall be not less than t~e number specified in Table VI:

(b)the number of watercloset fitments provided for female
persons employed or likely to be employed therein shall be
not less than the number specified in Table VII, and

(c)the number of lavatory basins provided for persons em-
ployed or likely to be employed therein shall not be less
than the number specified in Table VIII.

TABLE VI
No. of male persons employed or likely
Type of fliment to he employed and No. of fitments
to he provided therefor
Watercloset !t Less than 100. 1 such fitment for everv 25 such
fitments persons. or part thereof.
More than 100. 5 such fitments and 1 additional
such filment for every 50 such persons. or part
thereof. oicr 150~

Urinals 10 -50 inclusise. 1 such fitment.
More than 4~0. 2 such fitments and 1 additional such
fitment for every 50 such persons. or part thereof.
over 100.

TABLE VII

No. of females employed
or likely to be employed No. of 'atercloset fitments
1-10 inclusive 1
11-25 inclusive
More than 25 3 and 1 additional x& atercloset fitment for ever~
25 such persons. or part thereof, o~cr 50._

TABLE VIII

No. of male No. of female
persons persons
employed or 'o. of lavatory i No. ot'las.ator~
employed or
basins
likely to be likeR to he basins
employed employed
Less than 100 1 for every 25 Less than 100 1 for exer~. 25
such per- such pe'rsons.
sons. or part or part
thereof. thereof.
More than 100 5 and 1 addi- More than 100 -5 and 1 addi-
tional la,. a- tional lava-
tory basin tors basin
for every 50 for'everx SO
such per- such per-
sons, or part sons. or part
thereof. mer thereof, ol CF
150. ]so.

(2) Baths or showers shall be provided in any industrial
undertaking or other place of work (other than in a building used or
intended to be used for the purpose of an office) as required for the
trade or industry carried on therein.

(3) Where, in any building used or intended to be used for the
purpose of an office or in any industrial undertaking or other place
of work, the number of persons, whether the same are or will be
male persons or female persons. or both, employed or likely to be
employed does not or will not exceed 10, there shall be provided not
less than one watercloset fitment and one lavatory basin.

(4) In every building used or intended to be used for the
purpose of an office and in every industrial undertaking and other
place or work, the watercloset fitments, urinals and lavatory basins
for male persons and the watercloset fitments and lavatory basins
for female persons shall be provided in separate rooms exclusively
for the use of male persons and female persons respectively.

(5) For the purposes of this regulation-

(a)the number of persons employed or likely to be employed
in any building used or intended to be used for the purpose
of an office or in any other place of work (other than in an
industrial undertaking) shall be determined by the Build-
ing Authority, and, in the case of a building used or

intended to be used for the purpose of an office, shall be so
determined at the rate of one person for every 9 m' of
usable floor space;

(b)the number of persons employed or likely to be employed
in any industrial undertaking shall be determined by the
Commissioner for Labour. and

(c)in the case of a building used or intended to be used for the
purpose of an office, the proportion of male persons to
female persons employed or likely to be employed therein
shall be deemed to be 11, and. in any other case, shall be
determined by the Building Authority or, in the case of an
industrial undertaking, by the Commissioner for Labour.

6. (1) In every place of public entertainment and in every
public dance hall, the number of watercloset fitments, urinals and
lavatory basins provided shall be not less than the number specified
in Table IX.

TABLE IX

No. of male persons and No. of female persons and
Type offitment No. of fitments to be No. offitments to be
provided therefor provided therefor
Watercloset Less than 400. 1 such fitment Less than 200. 2 such fitments
fitments for cv cry 100 such persons. for every 100 such persons.
or part thereof. or part thereof.
More than 400. 5 such fitments More than 200. 5 such fitments
and 1 additional such fit- and f additional such fit-
i ment for every 250 such ment for every 100 such
persons. or part thereof. persons. or part thereof.
over 650. over 300.
Urinals 1 such fitment for every 50
such persons. or part
thereof.

Lavatory basins 1 such fitment for every 1001 such fitment for every 100
such persons. or part such persons. or part
thereof. thereof.

(2) In every place of public entertainment and in every public
dance hall, the watercloset fitments, urinals and lavatory basins for
male persons and the watercloset fitments and lavatory basins for
female persons shall be provided in separate rooms exclusively for
the use of male persons and female persons respectively.

(3) For the purposes of this regulation-

(a)the number of persons shall be determined by the Building
Authority. and shall be based on the maximum capacity of
the place of public entertainment or public dance hall. as
the case may be, and

(b)the proportion of male persons to female persons shall be
deernd to be 1: 1.

7. (1) In every cinema, the number of watercloset fitments,
urinals and lavatory basins provided shall be not less than the
number specified in Table X.

TABLE X

No. of male persons and i No. of female persons and
Type of fitmentNo. of fitments to beNo. of fitments to be
provided therefor provided therefor

Urinals1 such fitment for every 100
such persons. or part
thereof.
Lavatory basins1-200 inclusive. 1 such fit- 1! 1-200 inclusive. 1 such fitment.
ment.
201-500 inclusive. 2 such 201-500 inclusive. 2 such
fitments. fitments.
501-1 000 inclusive. 3 such 501-1000 inclusive. 3 such
fitments. fitments.
More than 1 OW 4 such fit-More than 1 000, 4 such fit-
mentsand 1 additional suchments and 1 additional such
fitment for every 500 suchfitment for every 500 such
persons, or part thereof.persons. or part thereof.
overl 500. overl 500.

(2) In every cinema, the watercloset fitments. urinals and
lavatory basins for male persons and the watercloset fitments and
lavatory basins for female persons shall be provided in separate
rooms exclusively for the use of male persons and female persons
respectively.

(3) For the purposes of this regulation-

(a)the number of persons shall be determined by the Building
Authority, and shall be based on the maximum capacity of
the cinema; and

(b)the proportion of male persons to female persons shall be
deemed to be 1: 1.

8. (1) In every restaurant, except a restaurant provided in
any hotel or boarding house for the use exclusively of persons
resident in the hotel or boarding house, the number of watercloset
fitments, urinals and lavatory basins provided shall not be less than
the number specified in Table Xl.

TABLE Xl

No. of male persons andNo. of female persons and
Type of fitment No. of fitments to be No. of fitments to be
provided therefor provided therefor
Waterclosei Less than 400. 1 such fitment Less than 200. 2 such fitments
fitments for every 100 such persons.for every 100 such persons,
or part thereof.or part thereof.
More than 400. 5 such fit-More than 200.5 such fitments
ments and 1 additional suchand 1 additional such fit-
fitment for every 250 suchment for every 100 such
persons. or part thereof.persons. or part thereof.
over 650. over 300.
Urinals 1 such fitment for every so
such persons. or part there-
Lavatory basins Less than 100, f such fitment Less than 100. 1 such fitment
for every 50 such persons.for exe' 50 such persons.
or part ~hcreoi'.or part thereof
More than 100. 3 such fitments More than 100. 3 such fitments
and 1 additional such fit-and 1 additional such fit-
1 ment for everv 100 suchment for every )00 such
persons. or part thereof.persons. or part thereof.
oi er 150. oi er 150.

(2) For the purposes of this regulation-

(a)the number of persons shall be determined by the Building
Authority, and shall be based on the maximum capacity of
the restaurant and determined at the rate of one person for
every 1.5 m' of the area therein used for dining; and

(b)the proportion of male persons to female persons shall be
deemed to be 1: 1.

8A. Where any watercloset cubicle for disabled persons is
provided in accordance with regulation 72* of the Building (Plan-
ning) Regulations that watercloset cubicle shall be not less than
1.5 m by 1.75 m in area and-

(a)the cubicle shall have in it a watercloset and a wash basin
both suitable for use by the disabled,

(b) no coin box shall be affixed to the door of the cubicle.

(c)any door fastening shall be capable of being operated from
the outside in the event of an emergency;

(d)where high-level cisterns are used, the chain shall extend to
not more than 1.35 m above floor level.,

(e)there shall be not less than 3 grab bars which shall be not
less than 25 mm nor more than 50 mm in external diameter
and shall be fixed not less than 30 mm clear of the walls;
and

the grab bars and wash basin shall be capable of carrying a
static load of 150 kg.

9. (1) Where, in any case, the installation of soil fitments is.
under regulation 89, prohibited-

(a)latrine fitments shall be provided in lieu of watercloset
fitments, and the number thereof shall be not less than the
number of watercloset fitments required by regulation 4. 5,
6, 7 or 8, as the case may be; and

(b)bucket urinals shall be provided in lieu of urinals, and,
likewise, the number thereof shall be not less than the
number of urinals required by regulation 4, 5. 6. 7 or 8, as
the case may be.

(2) Where, by regulation 4, 5, 6, 7 or 8, the provision of
watercloset fitments is required, trough waterclosets may be pro-
vided and, for the purposes of those regulations, every metre of
trough watercloset shall he deemed to be the equivalent of one
watercloset fitment.

(3) Where, by regulation 4, 5, 6. 7 or 8. the provision of urinals
is required, and trough urinals are installed. every 0.5 m of trough
urinals shall, for the purposes of those regulations. be deemed to be
the equivalent of one urinal.

10. For the avoidance of doubt, it is hereby declared that the
provision in a residential building, place of public entertainment,
cinema or restaurant of the watercloset fitments, urinals and lava-
tory basins required, by the regulations in this Part, to be provided
therein shall not exempt any person from providing, in accordance
with regulation 5, such watercloset fitments, urinals and lavatory
basins as are required thereby to be provided for persons employed
or likely to be employed in the residential building, place of public
entertainment, cinema or restaurant, as the case may be.

10A. (1) Where under these regulations there is required to be
provided in any building any watercloset fitment, trough water-
closet, latrine fitment or urinal, there shall be a permanent con-
nexion to such building of a supply of water which is satisfactory
and sufficient in all respects for the purpose of flushing every such
watercloset fitment, trough watercloset, latrine fitment or urinal and
for all other purposes for which such supply is to be used.

(2) Where under these regulations there is required to be
provided in any building any waste fitment or shower, there shall be
a permanent connexion to such building of a supply of water which
is satisfactory and sufficient in all respects for all the purposes for
which every such waste fitment or shower is to be used and for all
other purposes for which such supply. is to be used.

(3) The connexion of a supply of water for the purposes of
paragraph (1) or (2) shall be-

(a) of a supply of water from the waterworks; or

(b)if the Building Authority gives his permission in writing, of
a supply of water from a well within the site of the
building, or

(c.)if in all the circumstances of the case the Building Author-
ity is satisfied that it is not reasonable that the connexion
be of a supply of water from the waterworks or from a well
within the site of the building, of a supply of water from
such other source as the Building Authority may permit or
direct.

(4) In determining whether a supply of water is satisfactory
and sufficient under this regulation, regard shall be had to the
nature, type and size of the building. the purpose for which it was
constructed or is intended to be or is used and all the purposes for
which the supply of water is or is likely to be used.

(5) Before the Building Authority gives his permission undel
paragraph (3)(b) for the connexion to a building of a supply of water
from a well within the site of the building or before the Building
Authority under paragraph (3)(c) permits or directs the connexion
to a building of a supply of water from a source other than the
waterworks or a well witiiin the site of the building. there shall be
produced to the Building Authority by the building owner a certific-
ate from the water authority as to whether or not a supply of water
from the waterworks is available for the purposes for which such
connexion is made or to be made.

(6) The water authority shall issue the certificate required
under paragraph (5) within 10 days of receiving an application in
writing therefor.

PART Ill

PLUMBING

Soil.fitments and waste fittnents

11. All soil shall be properly conducted, by means of suitable
soil pipes, to drains provided for the carriage of foul water.

12. (1) Save as provided in paragraphs (2) and (3) waste pipes
shall discharge in the open air-

(a)over or into a suitable channel within 1 m of a properly
trapped gully;

(b) into a gully, above the level of the water therein; or

(c) into a suitable hopper head.

(2) Waste pipes from lavatory basins may discharge-

(a)into a suitable drainage channel immediately below the
lavatory basins, if such drainage channel discharges into a
trapped gully. or

(b)into a common waste pipe. if the common waste pipe
discharges through a trap and has adequate means of
access for cleaning.

(3) Subject to the provisions of regulation 25(3). waste pipes
may be connected to a soil pipe.

14. (1) Every watercloset fitment, other than a squatting type
fitment, shall be of such shape, capacity and mode of construction
as to retain a sufficient quantity of water and to receive normal
deposits of excrement into such water without undue soiling of the
sides of the fitment.

(2) Every watercloset fitment, other than a squatting type
fitment, shall be provided with a hinged seat or a suitable seat ~im
or inset.

15. The channel of a trough watercloset shall be not longer
than 5 m and shall have an even fall towards the outlet trap of not
less than 1 in 30.

16. The channels of every stall and trough urinal shall have an
even fall towards the outlet trap of not less than 1 in 120 and no part
of any such channel shall be more than 6 m from the trap to which it
discharges.

17. (1) A system of plumbing shall be provided for the supply
of water for flushing purposes to every watercloset fitment. trough
watercloset, urinal and slop sink.

(2) Every part of any such system of plumbing (Including
any storage tank for water solely for flushing purposes) shall be
constructed of material that is suitable for use with salt water.

18. Every watercloset fitment, bidet, basin-type urinal and slop
sink shall be provided with a suitable flushing rim for the effectual
flushing of the fitting.

(a) in the case of watercloset fitments and slop sinks-
(i) discharge to the watercloset fitment of slop sink, on
each occasion such fitment is used, not less than 9 1 and not
more than 14 1 of water; and
(ii) be provided with a ball valve so arranged as to
re-fill the cistern within 2 minutes,

(b)in the case of trough waterclosets, be fitted with automatic
discharging apparatus so arranged as to discharge-
(i) at the highest point of the channel;
(ii) at such intervals as may be necessary of ensure
adequate cleaning of the closet,

not less than 9 1 of water for every metre of the channel;

(c)in the case of urinals, be fitted with automatic discharging
apparatus so arranged as to discharge-
(i) into every basin or stall or, in the case of a trough
urinal. every metre thereof.,
(ii) at such intervals as may be necessary to ensure
adequate cleaning of the urinal,

not less than 4.5 1 of water.

20. Save in the case of trough waterclosets and urinals, pres-
sure valves may, where there is a suitable head of water, be installed
for flushing purposes without the provision of a flushing cistern.

21. The internal diameter of flushing pipes shall-

(a)in the case of watercloset fitments, trough waterclosets and
slop sinks. be not less than 32 mm;

(b)in the case of urinals (other than trough urinals), be not
less than 15 mm for each basin or stall; and

(c)in the case of trough urinals. be not less than 15 mm for
every metre thereof.

r 22. (1) Storage tanks for water solely for flushing purposes
shall be provided in every building in which watercloset fitments,
trough waterclosets, urinals or slop sinks are installed.

(2) Every such tank shall-

(a)at a position above the level of the highest fitment or on a
suitable water tower;

(b) fitted with a suitable close fitting cover, and

(c)provided with adequate access to enable the tank to be
entered and cleaned.

23. (1) Every flushing cistern and water storage tank shall be
provided with an overflow pipe.

(2) The overflow pipe from a water storage tank shall-

(a)have an internal diameter of one commercial size larger
than the supply pipe to the cistern or tank.,

(h)dip down, inside the tank, so as to terminate in a position
not more than 150 mm above the bottom of the tank, and

(c) discharge in a conspicuous position.

24. (1) Every soil fitment shall be provided with a suitable
trap with a water seal of not less than 50 mm.

(2) The internal diameter of every such trap shall be not less
than-

(a)80 mm, in the case of a watercloset fitment. slop sink. or
urinal with more than 3 basins or stalls or with a channel
longer than 2 m;

(b)50 mm, in the case of a urinal with more than one and not
more than 3 basins or stalls or with a channel not longer
than 2 m,

(c)40 mm, in the case of a bidet or urinal with a single basin or
stall; and

(d) 100 mm, in the case of a trough watercloset.

25. (1) Every waste fitment shall be provided immediately
under the fitment with a suitable trap:

Provided that a trap shall not be required-

(a) where the waste pipe from such fitment-
(i) does not exceed 1 m in length; and
(ii) discharges over or into a suitable trapped gully;

(b)in respect of lavatory basins, where the waste pipes there-
from discharge in the manner provided by regulation 12(2);

(c)in respect of a range of shower baths, where the drainage
channel provided therefor is provided, at its lowest point,
with a trap.

(2) Save as provided in paragraph (3), every trap provided for
a waste fitment shall have-

(a) an internal diameter of not less than 32 mm; and

(b) a water seal of not less than 40 mm.

(3) Where the waste pipe from a waste fitment is, under the
provisions of regulation 12(3), connected to a soil pipe, the trap
provided for the waste fitment shall-

(a) the bend shall-
(i) have an obtuse angle;
(ii) have the largest practicable radius of curvature; and
(iii) not change in any way the cross section of the pipe;
and

(b)a cleaning eye or other suitable means of access shall be
provided at or near the bend.

29. (1) Sufficient access shall be provided. by means of clean-
ing eyes or other approved method, to enable soil pipes and waste
pipes to be cleared of any obstruction.

(2) Such access points shall be so sited as to allow clearance
for the easy entry of cleaning rods.

30. (1) Where-

(a)more than one trap of a watercloset fitment. urinal, slop
sink or waste fitment is connected with one soil pipe. or

(b)more than one trap of a waste fitment is connected with
one waste pipe,

the traps shall be ventilated by means of anti-syphonage pipes:

Provided that if, in the case of waste fitments, the traps to such
fitments are constructed to prevent loss of water seal. it shall not be
necessary to provide an anti-syphonage pipe, unless the Building
Authority so requires.

(2) Every anti-syphonage pipe shall be connected with-

(a)the trap, if the connexion with the anti-syphonage pipe is
an integral part of the trap; or

(b) the branch soil pipe or branch waste pipe-
(i) on the side of the water seal nearest the main soil
pipe or waste pipe; and
(ii) at a point not more than 300 mm from the trap
outlet.

(3) The internal diameter of every anti-syphonage pipe shall-

(a)if the diameter of the soil pipe or waste pipe to which it is
connected is 80 mm or more, be not less than 50 mm;

(b)if the diameter of such soil pipe or waste pipe is less than
80 mm, be not less than-

(i) two-thirds of the internal diameter of such soil pipe
or waste pipe; or
(ii) 32 mm,

whichever is the greater.

(4)(a) The main anti-syphonage pipe may be connected to
a soil pipe which, under regulation 31(3), is acting as a
ventilating pipe;

(b)every such connexion shall be made at a point above the
flood level of the highest fitment connected to the soil pipe.

31. (1) Every ventilating pipe for any drain or sewer shall be
carried up to a height not less than 1 m above the roof of the
building to which it is fixed or, where such building has a pitched
roof, above the eaves of such building.

(2) No ventilating pipe shall be so fixed as to permit the escape
of foul air from any drain, sewer, soil pipe or waste pipe into any
building.

(3) Soil pipes or waste pipes may be carried up to a suitable
height above the building to which they are fixed to act as ventilating
pipes for any drain or sewer.

(4) The internal diameter of every ventilating pipe and of
every soil pipe or waste pipe which. under paragraph (3), is acting
as a ventilating pipe, shall be not less than 80 mm.

(5) The open end of every ventilating pipe shall be provided
with a suitable grating having apertures of an aggregate area not less
than the sectional area of the pipe.

(6) Ventilating pipes shall not be used for the carriage of
surface water.

32.(1) (a) Every rain water pipe which discharges to a drain
which is connected to a public sewer provided for the
carriage of surface water shall-
(i) in the case of a rain water pipe situated outside a
building, discharge either not more than 150 mm above the
level of the ground over a suitably trapped gully or into a
trapped gully below the level of the grating but above the
level of the water in the trap; and
(ii) in the case of a rain water pipe situated inside a
building (other than a rain water pipe used solely for the
conveyance of rain water from a roof), be properly trapped
with an efficient trap which shall be so formed and fixed as
to maintain a water seal of not less than 75 mm.

(b)Every rain water pipe which discharges to a channel shall
discharge at a height not more than 150 mm above the level
of the top of the channel.

(c)Every rain water pipe which discharges. through a cast
iron conductor, to the side channel in a street shall be
provided, at the foot thereof, with a shoe so as to ensure
that any surface water discharged from the pipe will
discharge directly into the conductor.

(2) The number and size of rain water pipes provided for any
building shall be calculated at the rate of 700 MM2 Of pipe to every
10 m' of horizontal roofed-over surface.

(3) Save as provided in regulation 33, the diameter of every
rain water pipe shall be not less than 65 mm.

(4) Rain water pipes shall not be connected with any soil pipe.
waste pipe or ventilating pipe.

(5) Where a rain water pipe discharges, across any footpath.
to the side channel of a street, it shall discharee through a cast iron
conductor.

33. (1) Any rain water pipe provided for the carriage of
surface water from a verandah or balcony shall, where there is, at a
suitable position. a rain water pipe provided for the carriage of
surface water from the roof of the building. be connected to such
pipe.

(2) Where a rain water pipe provided for the carriage of
surface water from a verandah or balcony discharges to the side
channel in a street or is, in accordance with paragraph (1), connected
to a rain water pipe which so discharges, the internal diameter of
the rain water pipe from the verandah or balcony shall be not
more than 40 mm.

34. (1) Every soil pipe, waste pipe, anti-syphonage pipe,
ventilating pipe, overflow pipe and every pipe connected with any
drain provided for the carriage of foul water shall be---

(a) circular in shape; and

(b)constructed of cast iron, steel, copper or other approved
material.

(2) Every rain water pipe shall be constructed of cast iron.
copper, aabesfes-e~t or other approved material.

(3) All such materials shall be sound and free from defects.

35. Every connexion of a soil pipe, waste pipe. anti-syphonage
pipe, ventilating pipe, rain water pipe or overflow pipe with any
other pipe, or with a trap, gutter or other fitting, as the case may be.
shall be made in a manner suitable to the nature of the materials of
which such pipe and such other pipe or trap, gutter or other fitting
are constructed, and so as to be watertight.

36. (1) Every soil pipe, waste pipe and rain water pipe shall be
securely fixed to the wall of the building for which it is provided.

(2) Any hole which is made in any floor or wall in order to
admit any such pipe shall be properly filled in and sealed round
the pipe.

37. Where a soil pipe, waste pipe, anti-syphonage pipe,
ventilating pipe, or rain water pipe is fixed in a duct within a
building, access panels shall be provided of such size and so situated
that adequate access is available to all pipe connexions within the
duct.

38. (1 ) Eaves gutters shall be-

(a) made of cast iron or other approved material;

(b) fixed at a gradient not less than 1 in 100; and

'(e) properly connected to rain water pipes.

(2) The size of eaves gutters shall be calculated at the rate of
700 MM2 of cross sectional area of gutter to every 7 M2 of horizontal
roofed-over surface.

38A. The Building Authority may permit, in writing and
subject to such conditions as he may endorse thereon. the use of
materials or the carrying out of any works that are subject to this
Part in accordance with a relevant British Standard Specification,
British Standard Code of Practice or other national standard
accepted by the Building Authority and that prescribes the quality
of material or standards of workmanship.

PART IV

DRAINAGE WORKS

39. Every building shall be provided with such pipes, drains
and channels as are necessary for the disposal of all foul water and
surface water from the building.

40. (1) Drains and private sewers, provided for the carriage
of foul water, shall, where there is a public sewer provided for the
carriage of foul water at a suitable level and position within 30 m of
the boundary of the lot on which the building, for which such drains
or private sewers are provided, is erected, be connected to such
public sewer.

(2) Where there is no such public sewer, the Building
Authority may, by order in writing, require the owner of any
building to provide a septic tank. a cesspool or other approved
facility.

41. (1) Save as provided in paragraph (2), all surface water
from a building shall, if there is a public sewer, provided for the
carriage of surface water, at a suitable level and position within 30 m
of the building, be conducted, by means of rain water pipes and
drains provided for the carriage of surface water. to such public
sewer or, where there is no such public sewer, shall be conducted, to
the satisfaction of the Building Authority, to a public channel
provided for the carriage of surface water or to the side channel in a
street.

(2) Where there is no such public sewer and no public channel
or side channel in a street, such surface water shall be conducted. to
the satisfaction of the Building Authority, to a stream course or
nullah.

42. No pipe provided for the carriage of surface water from a
building shall discharge across the surface of any footpath in a
street.

43. Drains provided for the carriage of sub-soil water may be
connected to a private or public sewer provided for the carriage of
surface water or to a drain provided therefor.

44. (1) Covered drains (except covered drains provided for
the carriage of sub-soil water) and covered sewers shall be made with
good sound pipes of glazed earthenware. stone ware, concrete, cast
iron or other approved material.

(2) Drains and sewers above the ground shall be laid with cast
iron pipes or other approved materials.

(a)in the case of pipes with a diameter not exceeding 150 mm,
have a thickness equal to not less than one-ninth of the
diameter of the pipe; and

(b)in the case of pipes with a diameter exceeding 150 mrn.
have a thickness equal to not less than one-twelfth of the
diameter of the pipe.

45. Drains provided for the carriage of sub-soil water shall be
constructed with clay field pipes or other suitable pipes and shall be
laid to adequate falls.

46. All drains and sewers shall be of adequate, but not
excessive, size for the purpose for which they are provided:

Provided that no covered drain shall have an internal diameter
of less than 100 mm.

47. (1) All drains and sewers. (except drains provided for the
carriage of sub-soil water) and traps shall be firmly laid on a bed of
concrete not less than 100 mm in thickness and at least 150 mm
wider than the diameter of the pipe or trap, and shall be haunched
with concrete so that the full width of the bed is carried up to the
level of the horizontal diameter of the pipe and from that point
splayed up on both sides of the pipe from the full width of the bed to
meet the pipe barrel tangentially.

(2) All drains and sewers shall be supported along the full
length of the barrels and not by the sockets.

(3) Where any drain or sewer is laid in soft and yielding
ground---

(a)adequate support shall be provided for such drain or
sewer, and

(b)save where the same are provided for the carriage of
sub-soil water, the pipes shall be completely surrounded by
at least 100 mm of concrete.

(4) Cast iron pipes above the ground may be carried on
adequate piers or other sufficient supports, if such support is
provided at each joint.

47A. (1) Every drain or sewer provided for the carriage of
foul water from any building which lies within a gathering ground
shall be watertight and shall-

(a)be laid in pipes of cast iron or other approved material and
be of such design and construction as to be capable of
resisting the pressure to which it is likely to be subjected;

(b)have any hatch box constructed on the drain or sewer so
that the hatch box is capable of resisting the pressure to
which it is likely to be subjected; and

(e)have every joint in the drain or sewer made in lead. or
other approved material so as to render the drain or sewer
capable of resisting the pressure to which the drain or
sewer is likely to be subjected.

(2) Every joint in a drain or sewer referred to in paragraph (1)
shall be made by bolting the flanges together securely with suitable
metallic or asbestos gaskets or shall be of such other approved
construction so as to render the drain or sewer capable of resisting
the pressures to which the drain or sewer is likely to be subjected.

(3) Hatch boxes shall be provided to a drain or sewer referred
to in paragraph (1)-

(a) at intervals not exceeding 30 m in the drain or sewer;

(b)at changes of gradient, if the Building Authority so
requires; and

(c) at every change in direction in the drain or sewer:

Provided that no hatch box is required where the
change in direction does not exceed 10 and is made by
means of a purpose-made bend.

(4) Notwithstanding paragraph (3), not more than one man-
hole shall be permitted in each drain or sewer.

(5) Every hatch box shall be constructed of cast iron or other
approved material and shall have a hatch or door securely bolted at
the top thereof.

(6) In this regulation ---

gathering ground- has the same meaning as in the Waterworks
Ordinance;

'hatch box' means a chamber of such a size and form as readily
allows inspection and testing of the drain or sewer on which it is
constructed and the clearance of obstructions from the drain or
sewer.

48. Every drain or private sewer shall be laid with a minimum
fall from its highest inlet to its connexion with a public sewer or
other outlet in accordance with Table XII below.

49. (1) The junction of a single branch drain with another
drain at an angle of not more than 45 in the direction of flow may
be made by means of a purpose-made Y junction.
(2) The junction of every other branch drain with another
drain shall be made within a manhole, obliquely at an angle of not
more than 60' in the direction of flow of such other drain, and shall
be above the invert of such other drain.

50. (1) Every joint in a drain or sewer shall be made in a
proper and efficient manner so as to render the drain or sewer
watertight and capable of resisting a pressure of a head of water of-

(a) 1.5 m; or

(b)the vertical distance between the invert level of the pipe
joint and the level of the top of the manhole immediately
preceding the joint,

whichever is the greater, and no material forming any such joint
shall project into the interior of any pipe in such manner as to cause
any obstruction in the drain or sewer.

(2) The joints of cast iron socketed pipes shall be made with a
gasket of hemp or yarn, and shall be properly caulked with metallic
lead or other approved material.

(3) The joints of cast iron flanged pipes shall be made by
bolting the flanges together securely with a suitable metallic or
asbestos gasket.

(4) The joints of earthenware, stone ware or concrete pipes
shall be made with a gasket of hemp or yarn, and cement mortar or
other approved material.

51. (1) Subject to paragraph (2), every inlet to a drain or
sewer shall be properly trapped by an efficient trap, which shall be so
formed and fixed as to maintain a water seal of not less than 75 mm.

(2) Paragraph (1) shall not apply-

(a) to an inlet for a soil pipe or a ventilating pipe;

(b) to an inlet for the carriage of any trade effluent;

(c) where no other means of connexion is practicable; or

(d)to an inlet to a drain used solely for the conveyance of rain
water from a roof.

52. (1) Every drain provided for the carriage of foul water
shall be ventilated at its highest point by means of a ventilating pipe
having an internal diameter of not less than 50 mm.

(2) Every manhole in which a disconnecting trap is fixed shall
be adequately ventilated.

(3) Branch drains shall be ventilated at their highest point, if
the Building Authority so requires.

53. No trap or other obstruction to the free circulation of air
shall be placed between the ventilation openings at the lower and
higher ends of any drain or sewer.

54. (1) All drains and sewers under a building shall be laid in
straight lines and shall be laid with cast iron sewage pipes.

(2) Where any drain or sewer is laid through any building, or
where any building is constructed over any drain or sewer, relieving
arches or beams shall be provided to protect such drain or sewer and
to prevent any load from the building being transmitted to such
drain or sewer.

55. (1) Manholes shall be provided-

(a)at every change in direction in any drain or sewer except
where-
(1) the change in direction does not exceed 45
(ii) the internal radius of the bend is not less than
6 times the internal diameter of the drain or sewer. and
(iii) the change in direction is made by means of a
purpose-made pipe; and

(b)at changes of gradient. if the Building Authority so
requires.

(2) Manholes or cleaning eyes shall be provided at intervals
not exceeding 60 m in every drain and sewer.

56. (1) Every manhole shall be of such size and form as to
allow ready access for rodding and shall be constructed of-

(a) brickwork in cement mortar at least 215 mm in thickness,

(b) concrete grade III at least 125 mm in thickness; or

(c) other approved impervious material.

(2) The foundation of every manhole shall be constructed of
concrete not less than 150 mm in thickness.

(3) Benchings shall be formed above the level of every drain-
age channel in a manhole to fall towards such channel at a gradient
of 1 in 2.

(4) The benchings and all the internal faces of every manhole
shall be rendered with cement mortar so as to provide a smooth
and impervious surface.

(5) Every drainage channel in a manhole shall be not less than
half round glazed earthenware or cement rendered, and shall have a
diameter not less than that of the largest drainage inlet into and not
more than that of the outlet from the manhole.

(6) Every drainage inlet to a manhole shall discharge into the
drainage channel therein with properly made bends constructed
within the benching of the manhole.

(7) Every manhole shall be fitted, on a level with the ground
surface, with a cast iron airtight cover of adequate strength and
approved design:

Provided that every manhole inside or under a building shall be
fitted with a double-sealed cast iron airtight cover.

57. (1) A suitable and efficient disconnecting trap shall be
provided for every drain and sewer provided for the carriage of foul
water, and for every drain and sewer provided for the carriage of
surface water except where such drain or sewer is connected to a
stream course or an open nullah.

(2) Except under and in accordance with a permit issued under
the Crown Land Ordinance to occupy Crown land thereby, every
such trap and the manhole in which it is fixed shall be situated on
land owned by the owner or owners of the building or buildings for
which the drain or sewer is provided, at a position as near as
practicable to the place at which such drain or sewer is connected to
a public sewer or, in the case of a drain or sewer, provided for the
carriage of surface water, which is connected to a covered nullah, at
a position as near as practicable to the nullah.

(3) Every such trap shall be-

(a) fixed within a manhole;

(b)so formed and fixed as to have a water seal of not less than
75 mm; and

(c)provided. as an integral part of the trap. with a cleaning
eye.

58. (1) Open trapped gullies shall be covered with a suitable
grating having openings equal to an area not less than the cross
sectional area of the outlet of the trap.

(2) Where sealed trapped gullies are used, adequate provision
shall be made for the ventilation of the space above the water level of
the trap.

59. Every cleaning eye shall be-

(a)fitted with a cover, in order to make the cleaning eye
airtight and watertight; and

(b) of such size as to allow easy entry for cleaning rods.

60. (1) All trenches in which drains or sewers have been laid
shall be carefully filled in, around and above the drains or sewers,
with earth which shall be carefully rammed and consolidated.

(2) No stones or other material which will not pass through a
50 mm ring shall be deposited in any such trench within 300 mm of
the top of any drain or sewer.

61. (1) Channels provided for the carriage of surface water
shall be of adequate size, constructed of approved impervious material.
finished off smooth and laid to a gradient of not less than 1 in 100.

(2) Suitable grilles shall be provided to prevent sand. silt and
other debris from entering any public sewer. public channel. nullah
or stream course.

*(3) A cover in a foot-path to a channel for the carriage of
surface water shall be flush with the path surface and any hole in
such cover or between such cover and another shall not exceed
20 mm in one dimension.

PART V

SEPTIC TANKS

62. (1) The owner of any building who is about to install a
septic tank shall submit to the Building Authority for his appro~al
the methods by which it is intended to dispose of the effluent and
sludge from the septic tank.

(2) The Building Authority shall not give his approval thereof
if, in his opinion, the method or methods proposed is or are likely
to cause a nuisance or injury to health.

63. (1) No septic tank shall be situated within 18 m of any
spring, stream of water or well, the water from which is used or
likely to be used for drinking or domestic purposes or for the
manufacture or preparation of articles of food or drink for human
consumption or for the cleansing of vessels used in the manufacture
or preparation of such articles.

(2) Every septic tank shall be so situated that the removal of
sludge can be carried out by an approved method.

64. Save insofar as provision is made therefor in these regula-
tions, every septic tank together with any ancillary installation for
the disposal of septic tank effluent shall be of such design as the
Building Authority may approve.

65. (1) Every septic tank shall have such minimum capacity
as shall be determined by the Building Authority in the manner
prescribed by paragraph (2):

Provided that no septic tank shall have a capacity of less than
2.3 m3 or more than 41 m3.

(2)(a) The septic tank shall be of such capacity as to be
capable of storing the quantity of soil and waste dis-
charged thereto during any one day.

(b)The quantity of soil and waste discharged shall be calcu-
lated according to the rate of consumption of potable and
flushing water which, in the opinion of the Building
Authority, is appropriate to the type, size and use of the
building.

(3) For the purposes of this regulation, the number of persons
using or likely to use the soil and waste fitments installed in any,
building shall be determined by the Building Authority.

66. (1) Every septic tank shall-

(a)have a depth of at least 1.2 m but not more than 1.8 m from
the invert of the inlet to the floor of the tank;

(b)have a length not less than 3 times but not more than 4
times its width.

(c)be provided with adequate means of access for the inspec-
tion and cleansing of each chamber.

(2) The sides of every septic tank shall be constructed of-

(a) brickwork in cement mortar not less than 215 mm thick,

(b) concrete grade III not less than 125 mm thick; or

(c) other approved material.

(3) The foundation and floor of every septic tank shall be
constructed of concrete grade III not less than 150 mm thick.

(4) All internal faces (including the floor) of every septic tank
shall be-

(a) rendered in cement mortar; or

(b) faced with other approved material.

so as to provide a smooth, impervious surface.

67. The inlet to and the outlet from every septic tank shall be
by means of dip pipes of such depth as to avoid disturbance of the
top scum.

68. In every septic tank the space between the top of the water
level and the underside of the cover shall be-

(a) adequately ventilated, or

(b) provided with adequate means for drawing off gases.

PART VI

CESSPOOLS

69. No cesspool shall be situated-

(a) within 20 m of any spring, stream of water or well. the
water from which is used, or likely to be used, for drinking
or domestic purposes or for the manufacture or prepara-
tion of articles of food or drink for human consumption or
for the cleansing of vessels used in the manufacture or the
preparation of such articles; or

(b)within 15 m of any building in which any person resides or
works.

70. Every cesspool shall be so situated that there shall be
adequate means for removing its contents without carrying them
through any building in which any person resides or works.

71. (1) Every cesspool shall have such minimum capacity as
shall be determined by the Building Authority in the manner
prescribed by paragraph (2).

(2)(a) The cesspool shall be of such capacity as to be capable
of storing the quantity of soil and waste iischarized thereto
during a period of one month.

(b)The quantity of soil and waste discharged shall be calculated
at the rate of 135 1 thereof for each day for each person
using or likely to use the soil fitments or waste fitments
installed in the building for which the cesspool is provided.

(3) For the purposes of this regulation. the number of persons
using or likely to use the soil fitments or waste fitments installed in
any building shall be determined by the Building Authority.

(b)so constructed and finished as to be impervious to liquid
either from the inside or the outside;

(c) covered with a reinforced concrete cover..

(d) provided with adequate access for cleaning purposes, and

(e) adequately ventilated.

(2) The internal faces of every cesspool shall be rendered with
cement mortar.

PART VII

TESTING OF DRAINAGE WORKS

73. (1) The registered contractor appointed in respect of any
drainage works shall, on the completion of such works, but before any
trenches in which drains or sewers have been laid are filled in, apply,
in writing, to the Building Authority for such works to be tested.
(2) On such application the Building Authority may inspect
and test the drainage works and shall-

(a)if he is satisfied with the result of such test, notify the
registered contractor appointed in respect thereof accord-
ingly; or
(b)if he is not so satisfied, order such work to be carried out as
may be necessary to cause such works to comply with these
regulations.
(3) An order made under paragraph (2)(b) shall be in writing
and shall specify-

(a) the work to be carried out, and

(b)the period of time within Which such work must be carried
out.

(4) After the expiry of the period specified in any such order.
the Building Authority shall again inspect and test the drainage
works and, where, by reason of any failure to comply with such
order. more than one further inspection and test is necessary,
shall inspect and test such works such number of times as may be
necessary and, when he is satisfied with the results of any test, shall
notify the registered contractor appointed in respect of such works
accordingly.

(5) In respect of every inspection and test made in accordance
with the provisions of paragraph (4), the registered contractor
appointed in respect of the drainage works shall pay the pre-
scribed fee.

(6) If the Building Authority does not test any drainage work
within 4 days of the receipt Of an application therefor under
paragraph (1), the trenches in which any drains and sewers have
been laid may be filled in.

74. Save where a trench in which drains or sewers have been
laid is filled in pursuant to the provisions of regulation 73(6), if a
trench in which drains or sewers have been laid is filled in before the
Building Authority has, under regulation 73, notified the registered
contractor appointed in respect of the drainage works that he is
satisfied with the result of a test, the Building Authority may require
such registered contractor to open and uncover the drainage works
in order to enable him to carry out an inspection and test.

PART VIII

CERTAIN WORK TO BE CARRIED OUT BY THE BuILDIM; AUTHORITY
AND RECOVERY OF COST THEREOF

75. (1) The connexion of every drain or private sewer to a
public sewer or nullah shall be made by the Building Authority who
may recover the cost thereof as provided in paragraph (3).

(2) The Building Authority shall not make any such con-
nexion until he is satisfied that the drainage work, of which such
drain or private sewer forms part, have been carried out in
accordance with the provisions of the Ordinance and regulations
made thereunder.

(3)(a) Where a drain is so connected to a public sewer. the
Building Authority may recover the cost of making the
connexion from the owner of the building for which the
drain is provided.

(b)Where a private sewer is so connected to a public sewer,
the Building Authority---
(i) may, where the buildings for which the private sewer
is provided are owned by the same person, recover the cost
of making the connexion from such person; or
(ii) shall, where such buildings are owned by difrerent
persons, apportion the cost of making the connexion
equally among such persons and may recover from each of
such persons his portion of the cost.

76. (1) Every disconnecting trap, required. by regulation 57,
to be provided, shall be fixed, and the manhole in which such trap is
fixed shall be constructed, by the Building Authority who may
recover the cost of such work as provided in paragraph (2).

(2)(a) Where the trap and manhole so fixed and constructed.
respectively, are provided for a drain, the Building
Authority may recover the cost thereof from the owner of
the building for which such drain is provided.

(b) Where the trap and manhole so fixed and constructed.
respectively, are provided for a private sewer, the Building
Authority-
(i) may, where the buildings for which the private sewer
is provided are owned by the same person, recover the cost
thereof from such person, or
(ii) shall, where such buildings are owned by difrcrent
persons, apportion the cost thereof equally among such
persons and may recover from each of such persons his
portion of the cost.

77. Without prejudice to the provisions of regulations 75 and
76, where, in order to comply with these regulations, any work has
to be carried out on unleased Crown land, the work shall be carried
out by the Building Authority who may recover the cost of the work
from the person for whom it is carried out.

78. Where, in contravention of regulation 75, 76 or 77, any
work has been carried out otherwise than by the Building Authority
the Building Authority may demolish, remove or alter such work
and may carry out such other work as he considers necessary and
may recover the cost of such work, in accordance with the provisions
of regulation 75, 76 or 77, as the case may be, as if such work had
been carried out pursuant to the provisions of such regulation.

PART IX

LATRINES

79. In the regulations in this Part,---openair' means a space
which-

(a) is vertically uncovered and unobstructed;

(b) is not less, in any dimension, than 1.5 m, and

(c)where such space is enclosed on four sides, has a horizontal
area of not less than 1 m' for every 6 m of the mean height
of the walls enclosing the space.

80. Every latrine. except a latrine fitted with a chemical closet
fitment, shall be provided with a self-closing door to the full height
of the opening.

81. (1) Save as provided in paragraph (2), the door of every
latrine shall open directly into the open air.

(2) Where the latrine fitment in any latrine is a chemical closet
fitment, the door of the latrine need not open into the open air, but
shall not open into any room used or intended to be used for the
manufacture, preparation or storage of food for human con-
sumption.

82. (1) Every latrine shall be provided with an opening for
light and ventilation.

(2) Every such opening shall-

(a)be such that the part thereof which is permanently open or
designed to open, as the case may be. is not less in area
than 0.2 m',

(b) be situated as near the ceiling of the latrine as practicable;

(e) communicate directly with the open air, and

(d) be covered with a metal or other approved mcsh flyscreen.

83. The floor of every latrine shall be not less than 150 mm
above the level of the ground outside the latrine and shall---

(a)be constructed of non-absorbent material and finished
with a smooth surface; and

(b)have a fall towards an outlet of not less than 1:25, save
that, in the case of a latrine designed for a squatting type
latrine fitment, the surface surrounding the aperture to the
receptacle for excrement shall have a fall towards the
aperture of not less than 1: 10.

to a height of not less than 1.2 m from the level of the floor of the
latrine.

85. In every latrine fitment-

(a)the walls of the space in which the receptacle for excrement
is placed shall, except the opening provided, in accordance
with sub-paragraph (b), to give access to such space, be
constructed of non-absorbent material; and

(b)adequate access, which shall be so covered as to prevent
flies from entering the space, shall be provided to enable
the space in which the receptacle for excrement is placed to
be cleaned and to enable such receptacle to be placed in the
fitment and removed therefrom.

86. Every latrine fitment shall be so designed and constructed
that, when the receptacle for excrement is placed therein, it is
retained in such a position as to prevent, so far as possible, the
deposit of excrement elsewhere than in the receptacle.

87. The receptacle for excrement shall be-

(a)constructed of galvanized metal or other non-absorbent
material;

(b)so constructed as to prevent the escape, by leakage or in
any other way, of its contents; and

(c) have a capacity not exceeding 50 1.

88. (1) Subject to the provisions of paragraph (2), the Build-
ing Authority may, where he thinks fit. permit the door of a latrine
not fitted with a chemical closet fitment or the opening required by
regulation 82, to open onto or communicate with. as the case may
be, an unenclosed verandah or balcony or any other unenclosed
space, if such verandah, balcony or other space-

(a)in the case of the door of a latrine, opens directly to the
open air, and

(b)in the case of the opening required by regulation 82,
communicates with the open air,

and, in any such case, such door or opening shall, for the purposes of
regulations 81 and 82, respectively, be deemed to open directly into
or communicate with the open air.

(2) The Building Authority shall not give his permission under
this regulation unless he is satisfied that to do so will not be to the
prejudice of the standard of lighting or ventilation or the health of
the occupiers of the building for which the latrine is provided.

PART X

M ISCEITANE01 S

89. In any case where he considers that the drains or private
sewers or other means provided for the disposal of soil from any
building are unsatisfactory, the Building Authority may. by order in
writing, prohibit the installation of soil fitments in the building.

90. Where. from any building it is intended to discharge. or
there may be discharged. into any drain or sewer-

(a) any trade effluent,

(b)any chemical refuse or waste steam or any liquid of a
temperature higher than 40 C being refuse or steam which.
or a liquid which when so heated, is either alone or in
combination with the contents of a drain or sewer.
dangerous, or the cause of a nuisance, or prejudicial to
health;

(e)any petroleum spirit, carbide of calcium, acid, grease or
oil; or

(d)any matter likely to injure any drain or sewer or to interfere
with the free flow of its contents or to affect prejudicially
the treatment or disposal of its contents.

the Building Authority may require the owner of the building to
provide neutralizing tanks, cooling tanks, petrol intercepting traps.
grease traps or other suitable provision.